就是字面的意思。可以交485的日期。
VB上有解释的:
The chart reflects dates for filing visa applications within a timeframe
justifying immediate action in the application process. Applicants for
immigrant visas who have a priority date earlier than the cut-off date in
the chart may assemble and submit required documents to the Department of
State’s National Visa Center, following receipt of notification from the
National Visa Center containing detailed instructions. The cut-off date for
an oversubscribed category is the priority date of the first applicant who
cannot submit documentation to the National Visa Center for an immigrant
visa. If a category is designated “current,” all applicants in the
relevant category may file, regardless of priority date.